12885865 has 16 divisors (see below), whose sum is σ = 16329600. Its totient is φ = 9741952.

The previous prime is 12885841. The next prime is 12885877. The reversal of 12885865 is 56858821.

It is a cyclic number.

It is not a de Polignac number, because 12885865 - 2¹⁷ = 12754793 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9606 + ... + 10864.

It is an arithmetic number, because the mean of its divisors is an integer number (1020600).

Almost surely, 2^12885865 is an apocalyptic number.

It is an amenable number.

12885865 is a deficient number, since it is larger than the sum of its proper divisors (3443735).

12885865 is a wasteful number, since it uses less digits than its factorization.

12885865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376.

The product of its digits is 153600, while the sum is 43.

The square root of 12885865 is about 3589.6887051665. The cubic root of 12885865 is about 234.4433179211.

The spelling of 12885865 in words is "twelve million, eight hundred eighty-five thousand, eight hundred sixty-five".